Seems that the [Heartbreak Charm], [Winking Eye of Love], [Sweet Perfume Broach], [Choker of the Pure Heart] & [Shard of Pirouetting Happiness] from the seasonal bosses (Apothecary Hummel) currently can be disenchanted!

Players can que with an enchanter and do it over and over for [Sha Crystal] chances!

This will definitely crash the market till V-Day is over or they hotfix these so they cannot be disenchanted.

It was always like this. It's intended.
And for anyone to even get a good amount of these, one should spend hours and hours of grinding. If anything, this will bring a minor benefit to those who use sha crystals regularly.
This won't bring the market any more low than your 24/7 bot tbh...